<template>
  <div class="app-container">
    <h2 style="text-align: center">发布新课程</h2>

    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px">
      <el-step title="填写课程基本信息" />

      <el-step title="创建课程大纲" />

      <el-step title="发布课程" />
    </el-steps>
    <!-- 原生的树装结构 -->
    <!-- 添加章节 -->
    <el-button type="text" @click="openChapterDialog">添加章节</el-button>

    <!-- 章节 -->
    <ul class="chanpterList">
      <li v-for="chapter in chapterVideoList" :key="chapter.id">
        <p>
          {{ chapter.title }}
          <span class="acts">
            <!--v-for里有chapter,编辑这里面传一个id，就用chapter.id传id-->
            <el-button type="text" @click="openVideo(chapter.id)">添加小节</el-button>
            <el-button type="text" @click="openEditChapter(chapter.id)">编辑</el-button>
            <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
          </span>
        </p>

        <!-- 小结-视频 -->
        <ul class="chanpterList videoList">
          <li v-for="video in chapter.children" :key="video.id">
            <p>
              {{ video.title }}
              <span class="acts">
                <!--v-for里有chapter,编辑这里面传一个id，就用chapter.id传id-->
                <el-button type="text" @click="openEditVideo(video.id)">编辑</el-button>
                <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
              </span>
            </p>
          </li>
        </ul>
      </li>
    </ul>
    <div>
      <el-button @click="previous">上一步</el-button>
      <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>
    <!-- 弹出层 -->
    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
      <el-form :model="chapter" label-width="120px">
        <el-form-item label="章节标题">
          <el-input v-model="chapter.title" />
        </el-form-item>
        <el-form-item label="章节排序">
          <el-input-number v-model="chapter.sort" :min="0" controls-position="right" />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
      </div>
    </el-dialog>

    <!-- 添加和修改课时表单,小节 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
      <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
          <el-input v-model="video.title" />
        </el-form-item>
        <el-form-item label="课时排序">
          <el-input-number v-model="video.sort" :min="0" controls-position="right" />
        </el-form-item>
        <el-form-item label="是否免费">
          <el-radio-group v-model="video.isFree">
            <el-radio :label="true">免费</el-radio>
            <el-radio :label="false">默认</el-radio>
          </el-radio-group>
        </el-form-item>

        <!-- 上传视频组件 -->
        <el-form-item label="上传视频">
          <!-- on-success:上传成功 on-remove:删除 before-remoce:删除之前 on-exceed:上传之前的一些设置和规定
          file-list:文件列表 
          -->
          <el-upload
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :url="BASE_API+'/eduvod/video/uploadAlyiVideo'"
            :action="BASE_API+'/eduvod/video/uploadAlyiVideo'"
            :limit="1"
            class="upload-demo"
          >
            <el-button size="small" type="primary">上传视频</el-button>
            <el-tooltip placement="right-end">
              <!-- 上传视频时的提示信息 -->
              <div slot="content">
                最大支持1G，
                <br />支持3GP、ASF、AVI、DAT、DV、FLV、F4V、
                <br />GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、
                <br />MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、
                <br />SWF、TS、VOB、WMV、WEBM 等视频格式上传
              </div>
              <i class="el-icon-question" />
            </el-tooltip>
          </el-upload>
        </el-form-item>
      </el-form>

      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveOrUpdateVideo">确 定</el-button>
      </div>
    </el-dialog>
  </div>
</template>
<script>
import chapter from "@/api/chapter/chapter";
import video from "@/api/video/video";
export default {
  data() {
    return {
      saveBtnDisabled: false, //保存按钮是否禁用
      courseId: "", //定义课程id
      chapterVideoList: [], //章节、小结集合
      chapter: {
        //章节初始化数据
        title: "",
        sort: 0
      },
      video: {
        //小节初始化数据
        title: "",
        sort: 0,
        isFree: 0,
        videoSourceId: "", //上传视频的id
        videoOriginalName: "" //上传视频的名称
      },
      dialogChapterFormVisible: false, //章节弹出层默认不弹出
      dialogVideoFormVisible: false, //小节弹出层默认不弹出
      fileList: [], //上传文件列表
      BASE_API: process.env.BASE_API //接口API地址
    };
  },
  created() {
    //获取路由中id的值
    if (this.$route.params && this.$route.params.id) {
      this.courseId = this.$route.params.id;
      //根据课程id查询章节和小结列表
      this.getChapterVideo();
    }
  },
  methods: {
    //========================================视频上传操作==============================================//

    //点击确定删除调用这个方法
    handleVodRemove() {
      //调用接口中删除视频的方法
      video
        .deleteAliyunvod(this.video.videoSourceId)
        .then(response => {
          //提示信息
          this.$message({
            type: "success",
            message: "删除视频成功！"
          });
          //清空文件列表
          this.fileList = [];
          //视频id和名称清空
          this.video.videoSourceId = "";
          this.video.videoOriginalName = "";
        })
        .catch(error => {});
    },
    //点击X会调用这个方法
    beforeVodRemove(file, fileList) {
      //通过file得到文件名称,弹一个框
      return this.$confirm(`确定删除${file.name}吗?`);
    },
    //上传视频成功调用的方法
    handleVodUploadSuccess(response, file, fileList) {
      //上传视频给id赋值
      this.video.videoSourceId = response.data.videoId;
      //上传视频给名称赋值
      this.video.videoOriginalName = file.name;
    },
    handleUploadExceed() {
      this.$message.warning("想要重新上传视频，请先删除已上传的视频");
    },

    //========================================小节操作==============================================//
    //1.弹出添加小节弹框的方法
    openVideo(chapterId) {
      //弹出弹出框
      this.dialogVideoFormVisible = true;
      //先设置章节id,小节操作需要课程id和章节id

      //每次弹出的时候让表单数据清空
      this.video = {
        chapterId: chapterId,
        title: "",
        sort: 0,
        isFree: 0,
        videoSourceId: "", //视频id
        videoOriginalName: "" //视频名称
      };
    },
    //修改或者添加小节信息
    saveOrUpdateVideo() {
      if (!this.video.id) {
        //如果video里面没有id就是做添加操作
        //调用添加的方法
        this.addVideo();
      } else {
        //如果有video里面有id就做修操作
        //调用修改的方法
        this.updateVideo();
      }
    },
    //2.添加小节
    addVideo() {
      //添加之前也要设置一下课程id,小节操作需要课程id和章节id
      this.video.courseId = this.courseId;
      video
        .addVideo(this.video)
        .then(response => {
          //关闭弹框
          this.dialogVideoFormVisible = false;
          //提示信息
          this.$message({
            type: "success",
            message: "添加小节成功!"
          });
          //刷新,调用查询所有章节信息的方法
          this.getChapterVideo();
        })
        .catch(error => {});
    },
    //3.删除小节
    removeVideo(id) {
      this.$confirm("此操作将删除小节, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      }).then(() => {
        //点击确定，执行then方法
        //调用删除的方法
        video.deleteVideo(id).then(response => {
          //删除成功
          //提示信息
          this.$message({
            type: "success",
            message: "删除小节成功!"
          });
          //刷新页面
          this.getChapterVideo();
        });
      }); //点击取消，执行catch方法
    },
    //4.修改小节数据回显问题
    openEditVideo(id) {
      //开启弹窗
      this.dialogVideoFormVisible = true;
      video
        .getVideoInfo(id)
        .then(response => {
          this.video = response.data.video;
        })
        .catch(error => {});
    },
    //5.修改小节
    updateVideo() {
      video.updateVideoInfo(this.video).then(response => {
        //关闭弹框
        this.dialogVideoFormVisible = false;
        //提示信息
        this.$message({
          type: "success",
          message: "修改小节成功!"
        });
        //刷新页面,调用查询所有章节信息的方法——刷新页面
        this.getChapterVideo();
      });
    },
    //========================================章节操作==============================================//
    //1.获取所有章节信息
    getChapterVideo() {
      chapter
        .getChapterListAll(this.courseId)
        .then(response => {
          //给chapterVideoList赋值
          this.chapterVideoList = response.data.allChapterVideo;
        })
        .catch(error => {});
    },
    //2.添加或者修改章节信息
    saveOrUpdate() {
      if (!this.chapter.id) {
        //如果chapter里面没有id就是做添加操作
        //调用添加的方法
        this.addChapter();
      } else {
        //如果有chapter里面有id就做修操作
        //调用修改的方法
        this.updateChapter();
      }
    },
    //3.弹出添加章节页面
    openChapterDialog() {
      //弹窗
      this.dialogChapterFormVisible = true;
      //每次弹出的时候让表单数据清空
      this.chapter = {
        title: "",
        sort: 0
      };
    },
    //4.修改章节信息数据回显
    openEditChapter(chapterId) {
      //chapterId是button按钮传过来的
      //回显时先弹出弹框
      this.dialogChapterFormVisible = true;
      //调用接口进行数据回显
      chapter
        .getChapter(chapterId)
        .then(response => {
          this.chapter = response.data.chapter;
        })
        .catch(error => {});
    },
    //5.修改章节信息
    updateChapter() {
      chapter
        .updateChapter(this.chapter)
        .then(response => {
          //关闭弹框
          this.dialogChapterFormVisible = false;
          //提示信息
          this.$message({
            type: "success",
            message: "修改章节信息成功!"
          });
          //刷新页面,调用查询所有章节信息的方法——刷新页面
          this.getChapterVideo();
        })
        .catch(error => {});
    },
    //6.添加章节信息
    addChapter() {
      //在保存之前要把courseId设置到chapter中,章节中需要courseId
      this.chapter.courseId = this.courseId;
      chapter
        .addChapter(this.chapter)
        .then(response => {
          //添加完成后关闭弹框
          this.dialogChapterFormVisible = false;
          //提示信息
          this.$message({
            type: "success",
            message: "添加成功!"
          });
          //刷新页面,再调用一次查询所有章节的方法就刷新了
          this.getChapterVideo();
        })
        .catch(error => {});
    },
    //7.删除章节
    removeChapter(chapterId) {
      //chapterId是button按钮传来的
      this.$confirm("此操作将删除章节, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      }).then(() => {
        //点击确定，执行then方法
        //调用删除的方法
        chapter.deleteChapter(chapterId).then(response => {
          //删除成功
          //提示信息
          this.$message({
            type: "success",
            message: "删除成功!"
          });
          //刷新页面
          this.getChapterVideo();
        });
      }); //点击取消，执行catch方法
    },
    //上一步
    previous() {
      console.log("上一步...");
      //点击上一步路由跳转到上一步,传一个courseId方便做数据回显
      this.$router.push({ path: "/course/save/" + this.courseId });
    },
    //下一步
    next() {
      console.log("下一步...");
      //点击下一步路由跳转到下一步
      this.$router.push({ path: "/course/publish/" + this.courseId });
    }
  }
};
</script>
<!-- 定义样式-->
<style scoped>
.chanpterList {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}
.chanpterList li {
  position: relative;
}
.chanpterList p {
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #ddd;
}
.chanpterList .acts {
  float: right;
  font-size: 14px;
}

.videoList {
  padding-left: 50px;
}
.videoList p {
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #ddd;
}
</style>
